Patents by Inventor David F. Beat

David F. Beat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual filament fluorescent lamp for avoinics liquid crystal displays
    Patent number: 5517079
    Abstract: A dual filament fluorescent lamp where the individual filaments are disposed along diameter lines of a fluorescent tube and are disposed on differing planes at differing heights within the tube with a predetermined separation between the tube filaments and the filaments being disposed in a perpendicular fashion when viewed from above. The primary filament is disposed above the secondary filament and it has a larger diameter that the secondary filament.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: May 14, 1996
    Assignee: Rockwell International Corporation
    Inventors: Thomas A. Seder, Brian P. Dehmlow, David F. Beat
  • Fluorescent lamp with improved efficiency
    Patent number: 5436532
    Abstract: Power is provided to a fluorescent lamp by connecting a source of alternating electrical current, consisting of a series of alternately positive and negative current pulses, to the lamp and shaping the current pulses such that the absolute value of the current increases as a function of time within each pulse.
    Type: Grant
    Filed: March 26, 1993
    Date of Patent: July 25, 1995
    Assignee: Rockwell International Corporation
    Inventors: David J. Benard, David F. Beat